The first volume (xii, , 433 p.) is not numbered and is devoid of any other intimation of a volume to follow. It includes an "Anhang" relative to the main collection of the Galilei Process documents formerly in the Archivio del Sant' Ufficio known as "no. 1181", and now in the Archivio segreto vaticano, capsula X: section C (p. 398-433 of the Anhang) contains "Wichtigste Actenstücke"
The second volume (xv, , 184 p.) has title: Die Acten des Galilei'schen Process nach der vaticanischen Handschrift herausgegeben ... 1877. Facing this t.p. is added t.p. with general title: Galileo Galilei ... Zweiter Band ... 1877